Home / 15,413.68-21,281.16-10,385.38

Finding the Fourth Proportional to 15,413.68, 21,281.16 and 10,385.38

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Solution

The fourth proportional to 15,413.68, 21,281.16 and 10,385.38 is: 14,338.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,413.68 : 21,281.16 = 10,385.38 : x
  2. Step 2: Convert to fraction form
    15,413.68/21,281.16 = 10,385.38/x
  3. Step 3: Cross multiply
    15,413.68x = 21,281.16 × 10,385.38
  4. Step 4: Simplify right side
    15,413.68x = 221,012,933.44
  5. Step 5: Solve for x
    x = 221,012,933.44/15,413.68
  6. Step 6: Final answer
    x = 14,338.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.